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Posts Tagged ‘Maintenance’

CSCS Scheduled Maintenance – Wednesday September 5th, 2012

Tuesday, September 4th, 2012

The next regular scheduled maintenance day for CSCS systems is Wednesday September 5th.

Due to an infrastructure intervention on that day Monte Rosa, Tödi and Matterhorn will not be available from 8  until 18.

Moreover, the following systems will be affected  with the expected downtimes as indicated:

* Front-end system:

Ela: no maintenance

* Cray XE6, Monte Rosa:   08:00 – 18:00

* Cray XK6, Tödi:   08:00 – 18:00

* Cray XMT, Matterhorn: 08:00 – 18:00

* iDataPlex, Castor/Pollux: 08:00 – 12:00 SW upgrade

* SGI Altix UV, Rothorn: 08:00 – 12:00

* Viz and post-processing, Eiger:  08:00 – 12:00 SW upgrade

Piz Julier:  no maintenance

* File System and Storage:

/home,  /apps:  09:00 – 18:00 possible interruption of the service

* Network: 9.30 – 12:00

LDAP and DB: 9.30 -14:00 during this time there might be possible authentication problems.

 

Today Todi’s Maintenance from 7AM to 7PM

Thursday, August 16th, 2012

Today August 16th, Tödi is going to be under maintenance from 7:00 AM until 7:00 PM.

The system will be upgraded to the pre-release of SMW7.0, CLE4. 1 and Cuda5.0.

Be aware that you will need to recompile your applications for the  new environment. Find below a more detailed description of the upgrade.

Details Tödi Upgrade

custom output of ” apstat ”

users can parse the output of ” apstat ” the way they want with ” -f ” option i.e: apstat -no -f ” NID,Pl,Rv,Hw”

GPU support in CLE4.1:

* CUDA 5.0 API

*  Kernel Driver + CUDA library + CUDA Toolkit

*  GPU “Modes” exclusive, persistent

*  Simultaneous Execution contexts

. Only one CUDA context ( i,e MPI rank ) per node by default

. Multiple contexts support throught CUDA proxy

. set ENV variable CRAY-CUDA_PROXY=1 before aprun

. Limitations include debugging, profiling memory protection

. Feature support is evolving…..

*  Memory scrubbing

. Zero GPU memory between jobs

. Automatic, transparent

. Not delivered by NVIDIA as of Aug 01, 2012

. Expect in future update

 

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